Exhaust nozzle



C. SEYMOUR EXHAUST NOZZLE Filed July 8, 1955 CfiarZewJymaag MENTOR ATTORNEY July 14, 1936.

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Patented July 14, 1936 TATES PATENT QFFECE 1 Claim.

This invention relates to an attachment for exhaust nozzles of steam locomotives and is especially adaptable for a nozzle of the character set forth in my U. S. Patent 1,825,479.

A nozzle constructed in accordance with my patent is limited in the number of ribs or rifiings which may be successfully employed with a smoke stack of a given size or a size which is standard in locomotive construction now in use due to the fact that too many ribs or riflings spread the exhaust steam too much for proper entrance into the smoke stack. However, an increased number of ribs or rifiings is desirable, providing that the exhaust steam is more efficiently. controlled from the nozzle to provide a better vacuum and consequently a more efficient-draft to the firebox of the locomotive, this being accomplished by increasing the velocity or force of the exhaust steam in the smoke stack and which will more thoroughly break up cinders into smaller particles and drive them to a greater height in the air so that the cinders cool to a greater extent before descending or reaching the ground which materially reduces fire hazards and further allowing the train in which the locomotive is a part to pass before the cinders reach a distance from the ground that would bring them in contact with the train. i

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a fragmentary vertical sectional view showing a locomotive equipped with an exhaust nozzle below the smoke stack and having my invention applied thereto.

Figure 2 is a plan view, partly in section, showing a nozzle with my invention adapted thereto.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

Referring in detail to the drawing, the numeral I indicates a fragmentary portion of a steam locomotive having a smoke stack 2 with a steam exhaust nozzle 3 arranged therein and through which the exhaust steam passes and is directed into the smoke stack with considerable velocity to create a vacuum for the purpose of providing desirable draft to the firebox of the locomotive. The nozzle 3 referred to forms the subject matter of my U. S. Letters Patent and from actual experiments it has been found that a nozzle of 5 this character must be limited in the number of ribs or riflings 4 or otherwise exhausting steam will be permitted to spread to such an extent that it will not be properly directed to the smoke stack. However, a greater number of ribs have 0 a determined value due to the fact that they will increase the velocity or force of the steam to the stack and in order to permit employment of additional ribs my invention is adapted in the bore of the nozzle 3, as shown at 5, and consists of an 15 annular band suitably secured to the spaced ribs 4. This band will interrupt the flow of exhaust steam through the port of the nozzle and direct or confine said steam for travel into the lower end of the smoke stack 2 so that said smoke stack will be completely filled by the steam passing therethrough and thereby increase the vacuum to act on the firebox of the locomotive. The ring or band 5 being secured to the ribs 4 will define between itself and the walls of the bore of the nozzle spaced openings, as indicated at 6, through which streams of steam may escape from the nozzle with a swirling movement due to the angle or pitch of the ribs and their other construction as clearly set forth in my patent. The band or ring 5 tapers towards its lower edge, as shown at I, to have a splitting or dividing eifect upon the steam as it passes upwardly through the bore of the nozzle.

Having described the invention, I claim:

In combination with an exhaust steam nozzle of a locomotive having a bore provided with spaced spirally formed ribs to provide a plurality of spiral steam grooves terminating at the discharge end of said body, an annular band engaging said ribs to convert the discharge ends of the grooves into arcuately curved slots and to provide a centrally arranged steam discharge opening, said band having a tapered edge disposed in the direction of the steam receiving end of the nozzle to direct the steam into the grooves and the centrally arranged discharge opening, and means for detachably securing the band to the nozzle.

CHARLES SEYMOUR. 

